.h1 {
    text-align: center;
}

.h2 {
    text-align: center;
}

.span1 {
    margin-left: 5px;
    margin-right: 5px;
    color: blue;
    text-decoration: underline;
}

.span2 {
    margin-left: 5px;
    margin-right: 5px;
}

.span3 {
    margin-left: 5px;
    margin-right: 5px;
    font-weight: bold;
}

.input1 {
    width: 60px;
    margin-left: 5px;
    margin-right: 5px;
}

.input2 {
    width: 200px;
    margin-left: 5px;
    margin-right: 5px;
}

.button1 {
    margin-left: 5px;
    margin-right: 5px;
    margin-top: 5px;
    margin-bottom: 5px;
}

.hr1 {
    border: none;
    height: 1px;
    border-top: 1px dashed blue;
}

.hr2 {
    border: none;
    height: 1px;
    border-top: 1px dashed green;
}

.img1 {
    height: 100px;
    margin-left: 5px;
    margin-right: 5px;
}

.routerLink1 {
    margin-left: 5px;
    margin-right: 5px;
}

.li1 {
    list-style: decimal;
}